Ext.History.getToken() returns the String 'null' in Gecko browsers

In Firefox using Ext 3.3.2 with a current url without a # in it, Ext.History.getToken() returns a string with 'null'. That didn't happen in 3.3.1 where an Ext.History.getToken() returned returned null (object).

This change in pkg-history-debug.js is probably causing it:
Ext 3.3.1: